| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 3 | |
| #2 | Switzerland | 3 | |
| #3 | United States | 2 | |
| #4 | Brazil | 1 | |
| #5 | Germany | 1 | |
| #6 | France | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry |
| # | Technology | |
|---|---|---|
| #1 | Pigments |
| # | Name | Total Patents |
|---|---|---|
| #1 | North Robert Jarl | 3 |
| #2 | Gerson Herman | 3 |
| #3 | Lerner Lawrence Robert | 2 |
| #4 | North Robert J | 2 |
| #5 | Santimauro John Francis | 2 |
| #6 | Bachmann William E | 1 |
| #7 | Lerner L | 1 |
| #8 | Jiyon Furanshisu Santeimooro | 1 |
| #9 | Gerson H | 1 |
| #10 | Flatt Thomas R | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4099980A | Process for producing gamma quinacridone solid solutions | |
| US4064129A | Process for making quinacridone and its derivatives | |
| CA1050984A | Process for preparing gamma quinacridone from polyphosphoric acid and alcohol |